Fluid-pressure governor



(N0 Mod 1.)

e G. KIMBALL & H. s. TEAL.

FLUID PRESSURE GOVERNOR.

No. 449,222. Patented Mar. 31,1891.

222 255 65. lfigjzjzm the induction side thereof.

UNITED STATES PATENT OFFICE.

GRANVILLE KIMBALL AND HENRY S. TEAL, OF CHICAGO, ILLINOIS.

FLUID-PRESSURE GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 449,222, dated March 31, 1891.

Application filed June 6, 1890. Serial No. 354,408. (No model.)

To all whom, it may concern.-

Be it known that we, GRANVILLE KIMBALL and HENRY S. TEAL, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Fluid-Pressure Governors, which is fully set forth in the following specification,reference being had to the accompanying drawing.

This invention relates to a fluid-pressure governor especially designed to be used in connection with a steam-pump forthe purpose of preserving any desired head or pressure of water by automatically cutting off the supply of steam when such head is reached and turning it on again whenever the pressure of the water falls below the predetermined maximum. It is common to use for this purpose the ordinary fluid-pressure regulator, which is interposed in a steam-pipe to maintain a certain steam-pressure on the delivery side, regardless of the variations upon These latter devices furnish an even pressure of steam to the pump, it is true; but the source from which the pump draws the water is usually far from regular. Thus in cities the pressure of the water in the mains varies constantly, being greater at one hour of the day than another, and always liable to be raised or lowered by a thousand different causes. If the pump receives the same steam-pressure at all times the water-pressure delivered by the pump will rise and fall with the pressure in the mains or other source of supply. The present invention contemplates the regulation of the steam-supply by the pressure of water delivered by the pump and it consistsin certain improved mechanism therefor, which is fully described below, and defined in the following claim.

The drawing furnished herewith shows a central vertical section of a governor embodying ourinvention. Referring thereto, it will be seen that the body of said governor consists of a valve-casing A, provided with a central steam-port a and induction and eduction ports a and a respectively. A valve B rests upon a seat in the central opening a,

and is actuated by a stem 1) to open or close the passage through the governor.

Upon the valve-casing is mounted by means of legs G O a diaphragm-casing D. inclosing a chamber (Z between itself and a diaphragm E, of rubber or other similar materia Said diaphragmis attached to the valve-stem b by means of nuts 9 g, threaded thereto, washers being interposed to protect the diaphragm.

At the point where the valve-stem leaves the valve-casing a stuffing-box H is provided to prevent leakage, and as near as convenient to the box a bridge I unites the legs 0 G, furnishing a support for a spring J, coiled about the valve-stem and compressed between the bridge and a nut K, threaded to the stem. A lock-nut L may also be used, as shown. A

second bridge M extends across just beneath a the diaphragm, and below it a nut N is also threaded to the stem. In attaching the governor to the pump the valve-casing is interposed in the steam-pipe, with the eduction side next to the cylinder, and a connection with the delivery-pipe of the pump leads the water into the chamber d through a port d. The drawing shows the valve closed. To start the pump, the nut N is first turned away from the bridge M as far as the valve is to open, but no farther, as this nut is designed to protect the diaphragm from an upward thrust of the valve-stem. The spring J is then compressed by means of the nut K until its force overcomes whatever pressure the water in chamber cl may exert upon the diaphragm. The valve now opens and allows the steam to work the pump. As soon as the desired head is obtained the spring J should be released until it just balances the waterpressure on the diaphragm. This fixes the water-pressure which will be maintained, as the spring J will openthe valve and admit more steam whenever the pressure falls, or will be compressed to close the valve and cut off the steam whenever the pressure rises.

It is convenient at times in the use of these governors to be able to furnish a constant and even steam-pressure to the pump, and we have made provision for this by boring the valve-stem to form a connection between the eduetion side of the valve-casing and the chamber (Z. \Vhen the Water-pressure is used in this chamber, the bore is closed by a screwplug 1). To use the steam-pressure, this plug 5 should be removed and the port d plugged,

We claim as new and desire to secure by Letters Patent In combination, the valve-easing and valve,

the isolated diaphragm casing and dia- 10 phragm, the connecting Valve-stem bored to form a possible connection between the interiors of the two casings, and a screw-plug b, adapted to close the bore in the valvestem, substantially as described.

GRANVILLE KIMBALL. HENRY S. TEAL.

Witnesses:

JOHN A. CALDWELL, HARRY BITNER. 

